Wiring Confusion - How do I connect brake light module? - Honda Rebel Forum
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post #1 of 12 Old 01-31-2019, 08:39 AM Thread Starter
 
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Wiring Confusion - How do I connect brake light module?

I purchased a Smart Braking Module to install on my rebel. I noticed that I do the majority of my slowing down through engine braking since the rebel engine is pretty small and decelerates pretty quickly. The module has an accelerometer, and it detects when you slow down to flash the brake lights for you. Simple and easy, right? Well……

When I took the rear and front seat off, I could not find the right wires for the life of me. I was supposed to find the wires that go to the brake light, and connect the module to the wires via these plastic looking wire clamps (see photo below). On the installation paper for the module, it says to connect the module to these color wires:

For Honda, it says:
Connect the Power wire on module to Brown/White wire.
Connect the Signal wire on module to Green/Red wire.
Connect the Ground wire on module to Green wire.


I could not find this connection for the life of me. I pulled up the wire diagram for my motorcycle (see photo below) and tried to match it to the motorcycle. I saw the blue wire for right turn signal, but I didn’t see the yellow wire for the left turn signal. I didn’t need either of those now (although I will when I install my rear turn signals this weekend), so I moved on.

I saw a green and yellow wire, two orangeish/brown wires (pretty dirty), a few black wires, and a dark brown/redish wire. I was totally confused and didn’t know how to connect the module, so I just put everything back together and left it.

How can I connect the module? What wires should it go to?
Also, when I looked underneath the rear fender, I saw a dark wire (they were all super dark from dirt) that was disconnected/frayed. No idea what that was for, but my brake light works fine currently.

Also, pretty worried about how I’ll connect my turn signals this weekend since I couldn’t find the yellow left turn signal wire…
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File Type: jpg 61lshyJhFsL._SL1200_.jpg (104.6 KB, 1 views)
File Type: jpg honda_rebel_250_wiring_diagram.jpg (243.4 KB, 6 views)

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #2 of 12 Old 01-31-2019, 10:41 AM
haf
 
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I did something similar to mine but as strobe light during braking...

i removed the seat and there is connector that goes to the rear fender .. From there you can use the cables according the diagram that you uploaded..


Signal wire on green/yellow (that comes from front/rear brake switch)
Ground wire on Green
for Power maybe from red (check with a voltmeter if has steady positive power or only if lights are on)
Otherwise you need to check for any other wire close to the connector that has permanently power

1996 Honda CMX 250
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post #3 of 12 Old 01-31-2019, 10:55 AM
 
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When I'm slowing down in traffic, and I'm concerned about following traffic not noticing, I pull the front brake lever just slightly. Not enough to apply the brake, but enough to turn on the brake light to warn following traffic that I am slowing and may slow down more if I have to stop quickly.
If I were you, I would not add to the already modded/damaged wiring of your bike you describe by trying to add this thing in your brake light circuit. I'm not a big fan of these strobe flashers in brake lights circuits, particularly if it goes off just by rolling off the throttle. It's really annoying for following traffic, and may actually encourage someone to try to pass when perhaps its not safe to do so.

2004 Rebel 250, 2003 BMW K1200GT (roadburner), 2004 BMW R1200GS(all purpose),
1973 Norton Interstate (in a box in the basement)
1968 Triumph Bonneville
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post #4 of 12 Old 01-31-2019, 10:58 AM
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These replacement LED lights flash, require no wiring, and have good reviews from motorcyclists: https://www.ebay.com/itm/2x-1157-LED...:rk:6:razz:f:0

Going to order some myself.

Keepin' all the left over parts. Gonna use 'em to build another bike!

'01 & '09 Rebel 250, '06 Ninja 250, '89 VN 750
Putting your bike year and model in your signature helps others help you!
Here's how: https://www.hondarebelforum.com/f19/...re-121087.html
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post #5 of 12 Old 01-31-2019, 01:10 PM Thread Starter
 
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Quote:
Originally Posted by haf View Post
I did something similar to mine but as strobe light during braking...

i removed the seat and there is connector that goes to the rear fender .. From there you can use the cables according the diagram that you uploaded..


Signal wire on green/yellow (that comes from front/rear brake switch)
Ground wire on Green
for Power maybe from red (check with a voltmeter if has steady positive power or only if lights are on)
Otherwise you need to check for any other wire close to the connector that has permanently power
Ah, this is helpful! I will check back with a friend who knows electrical stuff more than me to try to do this, thanks!

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #6 of 12 Old 01-31-2019, 01:13 PM Thread Starter
 
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Quote:
Originally Posted by Duckster View Post
When I'm slowing down in traffic, and I'm concerned about following traffic not noticing, I pull the front brake lever just slightly. Not enough to apply the brake, but enough to turn on the brake light to warn following traffic that I am slowing and may slow down more if I have to stop quickly.
If I were you, I would not add to the already modded/damaged wiring of your bike you describe by trying to add this thing in your brake light circuit. I'm not a big fan of these strobe flashers in brake lights circuits, particularly if it goes off just by rolling off the throttle. It's really annoying for following traffic, and may actually encourage someone to try to pass when perhaps its not safe to do so.
Thanks for the response, I engine break so often, I really think this would be helpful. I'll only do it if I can for sure figure out the wiring, so I'm going to have a friend who is more experienced help me out!

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #7 of 12 Old 02-01-2019, 08:06 AM
 
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Connect module's power wire to the BROWN wire (tail and license plate light +12v always on when key turned ON)
Connect the module's signal wire to GREEN/YELLOW (brake light +12v turns on when front or rear brake applied.)
Connect the module's ground wire to GREEN (always grounded)

All 3 of these are under the seat where the main wiring harness connects to the rear-end wire harness. With dirt and sun fading and age making the colors hard to discern you may want to use a voltmeter to verify each.
The other 2 wires in that harness are:
Right Turn signal is LIGHT BLUE, left turn signal is ORANGE. You want to connect rear turn signals inside the junction box behind the license plate up in the rear of the fender.
what lights do you not have on the rear end if your tail and brake lights work? - that might be what the frayed dirty wire is for....turn signal?

2009 Honda Rebel 250
"The bravest thing for me to do is admit when I am wrong" - unknown
HRF Answer #1 You should take the MSF Rider Course
HRF Answer #2 You need to clean your carburetor
HRF Answer #3 Sorry we assumed if you didn't say otherwise
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post #8 of 12 Old 02-01-2019, 08:21 AM
 
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Depending on where you plan to connect the modulator, the brown wire is eventually connected to a black wire. There is no red wire that far back in the harness. Make the connections at the rear wiring harness, using bullet connectors.

1980 Twinstar CM200T
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post #9 of 12 Old 02-01-2019, 08:27 AM Thread Starter
 
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Quote:
Originally Posted by kryton View Post
Connect module's power wire to the BROWN wire (tail and license plate light +12v always on when key turned ON)
Connect the module's signal wire to GREEN/YELLOW (brake light +12v turns on when front or rear brake applied.)
Connect the module's ground wire to GREEN (always grounded)

All 3 of these are under the seat where the main wiring harness connects to the rear-end wire harness. With dirt and sun fading and age making the colors hard to discern you may want to use a voltmeter to verify each.
The other 2 wires in that harness are:
Right Turn signal is LIGHT BLUE, left turn signal is ORANGE. You want to connect rear turn signals inside the junction box behind the license plate up in the rear of the fender.
what lights do you not have on the rear end if your tail and brake lights work? - that might be what the frayed dirty wire is for....turn signal?
Whoa, this is super helpful.

I didn't know that there was a junction box. I will have to look into it. I don't have any license plate light? I need to post pics of the bike and wires when I get home, that would be helpful I'm sure.

Past: 2002 Honda Rebel 250
Current: 2018 Honda Rebel 300 ABS
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post #10 of 12 Old 02-01-2019, 09:09 AM
 
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part #23, plastic cover, goes up inside the rear of the rear fender to cover the license & turn signal wire connections, that i'm guessing you saw when you mentioned a frayes/broken/dark wire and are missing that cover....
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File Type: jpg license junction.JPG (68.1 KB, 1 views)

2009 Honda Rebel 250
"The bravest thing for me to do is admit when I am wrong" - unknown
HRF Answer #1 You should take the MSF Rider Course
HRF Answer #2 You need to clean your carburetor
HRF Answer #3 Sorry we assumed if you didn't say otherwise
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